[GtkGLExt] Is it a bug of gtkglext?
- From: 明覺 <shi minjue gmail com>
- To: gtkglext-list gnome org
- Subject: [GtkGLExt] Is it a bug of gtkglext?
- Date: Wed, 13 May 2009 15:09:04 +0800
I compiled the example gtkglextmm program gears.cc(attached) to
a.out, it can start and display successfully, but if i resize the
window, a segmentation fault error will occur, here is the error info
from valgrind. any advice to solve it? thanks
------------------------------------------------------------------------------------------
minjue:~/workspace/Meck# valgrind --tool=memcheck ./a.out
==26447== Using valgrind-3.4.1-Debian, a dynamic binary
instrumentation framework.
==26447== Copyright (C) 2000-2008, and GNU GPL'd, by Julian Seward et al.
OpenGL visual configurations :
glconfig->is_rgba() = true
glconfig->is_double_buffered() = true
glconfig->is_stereo() = false
glconfig->has_alpha() = false
glconfig->has_depth_buffer() = true
glconfig->has_stencil_buffer() = false
glconfig->has_accum_buffer() = false
Gdk::GL::USE_GL = true
Gdk::GL::BUFFER_SIZE = 24
Gdk::GL::LEVEL = 0
Gdk::GL::RGBA = true
Gdk::GL::DOUBLEBUFFER = true
Gdk::GL::STEREO = false
Gdk::GL::AUX_BUFFERS = 0
Gdk::GL::RED_SIZE = 8
Gdk::GL::GREEN_SIZE = 8
Gdk::GL::BLUE_SIZE = 8
Gdk::GL::ALPHA_SIZE = 0
Gdk::GL::DEPTH_SIZE = 24
Gdk::GL::STENCIL_SIZE = 0
Gdk::GL::ACCUM_RED_SIZE = 0
Gdk::GL::ACCUM_GREEN_SIZE = 0
Gdk::GL::ACCUM_BLUE_SIZE = 0
Gdk::GL::ACCUM_ALPHA_SIZE = 0
GL_RENDERER = Software Rasterizer
GL_VERSION = 2.1 Mesa 7.6-devel
GL_VENDOR = Mesa Project
GL_EXTENSIONS = GL_ARB_depth_texture GL_ARB_draw_buffers
GL_ARB_fragment_program GL_ARB_fragment_program_shadow
GL_ARB_fragment_shader GL_ARB_framebuffer_object
GL_ARB_half_float_pixel GL_ARB_imaging GL_ARB_multisample
GL_ARB_multitexture GL_ARB_occlusion_query GL_ARB_pixel_buffer_object
GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_shader_objects
GL_ARB_shading_language_100 GL_ARB_shading_language_120 GL_ARB_shadow
GL_ARB_shadow_ambient GL_ARB_texture_border_clamp
GL_ARB_texture_compression GL_ARB_texture_cube_map
GL_ARB_texture_env_add GL_ARB_texture_env_combine
GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3
GL_ARB_texture_mirrored_repeat GL_ARB_texture_non_power_of_two
GL_ARB_texture_rectangle GL_ARB_transpose_matrix
GL_ARB_vertex_buffer_object GL_ARB_vertex_program GL_ARB_vertex_shader
GL_ARB_window_pos GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color
GL_EXT_blend_equation_separate GL_EXT_blend_func_separate
GL_EXT_blend_logic_op GL_EXT_blend_minmax GL_EXT_blend_subtract
GL_EXT_compiled_vertex_array GL_EXT_convolution GL_EXT_copy_texture
GL_EXT_depth_bounds_test GL_EXT_draw_range_elements
GL_EXT_framebuffer_object GL_EXT_framebuffer_blit GL_EXT_fog_coord
GL_EXT_gpu_program_parameters GL_EXT_histogram
GL_EXT_multi_draw_arrays GL_EXT_packed_depth_stencil
GL_EXT_packed_pixels GL_EXT_paletted_texture
GL_EXT_pixel_buffer_object GL_EXT_point_parameters
GL_EXT_polygon_offset GL_EXT_rescale_normal GL_EXT_secondary_color
GL_EXT_separate_specular_color GL_EXT_shadow_funcs
GL_EXT_shared_texture_palette GL_EXT_stencil_two_side
GL_EXT_stencil_wrap GL_EXT_subtexture GL_EXT_texture GL_EXT_texture3D
GL_EXT_texture_edge_clamp GL_EXT_texture_env_add
GL_EXT_texture_env_combine GL_EXT_texture_env_dot3
GL_EXT_texture_lod_bias GL_EXT_texture_mirror_clamp
GL_EXT_texture_object GL_EXT_texture_rectangle GL_EXT_texture_sRGB
GL_EXT_texture_swizzle GL_EXT_vertex_array GL_EXT_vertex_array_bgra
GL_3DFX_texture_compression_FXT1 GL_APPLE_packed_pixels
GL_APPLE_vertex_array_object GL_ATI_blend_equation_separate
GL_ATI_envmap_bumpmap GL_ATI_texture_env_combine3
GL_ATI_texture_mirror_once GL_ATI_fragment_shader
GL_ATI_separate_stencil GL_IBM_multimode_draw_arrays
GL_IBM_rasterpos_clip GL_IBM_texture_mirrored_repeat
GL_INGR_blend_func_separate GL_MESA_pack_invert GL_MESA_resize_buffers
GL_MESA_texture_array GL_MESA_ycbcr_texture GL_MESA_window_pos
GL_NV_blend_square GL_NV_fragment_program GL_NV_light_max_exponent
GL_NV_point_sprite GL_NV_texture_env_combine4 GL_NV_texture_rectangle
GL_NV_texgen_reflection GL_NV_vertex_program GL_NV_vertex_program1_1
GL_OES_read_format GL_SGI_color_matrix GL_SGI_color_table
GL_SGI_texture_color_table GL_SGIS_generate_mipmap
GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp
GL_SGIS_texture_lod GL_SUN_multi_draw_arrays
11 frames in 5.071 seconds = 2.169 FPS
==26447== Conditional jump or move depends on uninitialised value(s)
==26447== at 0x5F8BE57: glXWaitX (glxcmds.c:659)
==26447== by 0x9CB211C: g_closure_invoke (gclosure.c:767)
==26447== by 0x9CC5C2A: signal_emit_unlocked_R (gsignal.c:3247)
==26447== by 0x9CC7021: g_signal_emit_valist (gsignal.c:2980)
==26447== by 0x9CC74F2: g_signal_emit (gsignal.c:3037)
==26447== by 0x792D269: gtk_widget_size_allocate (in
/usr/lib/libgtk-x11-2.0.so.0.1600.1)
==26447== by 0x783F157: (within /usr/lib/libgtk-x11-2.0.so.0.1600.1)
==26447== by 0x9CB206E: g_closure_invoke (gclosure.c:767)
==26447== by 0x9CC5512: signal_emit_unlocked_R (gsignal.c:3177)
==26447== by 0x9CC7021: g_signal_emit_valist (gsignal.c:2980)
==26447== by 0x9CC74F2: g_signal_emit (gsignal.c:3037)
==26447== by 0x792D269: gtk_widget_size_allocate (in
/usr/lib/libgtk-x11-2.0.so.0.1600.1)
--
我的操?系統是Gnu/Linux Debian/gNewSense Gnome Mozilla Gmail/Evolution
Gtkmm/Gtkglextmm Scim Totem Pidgin.
// -*- C++ -*-
/*
* 3-D gear wheels. This program is in the public domain.
*
* Brian Paul
*/
/* Conversion to gtkglextmm by Naofumi Yasufuku */
#include <iostream>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <gtkmm.h>
#include <gtkglmm.h>
#ifdef G_OS_WIN32
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
#endif
#include <GL/gl.h>
#include <GL/glu.h>
//
// OpenGL frame buffer configuration utilities.
//
struct GLConfigUtil
{
static void print_gl_attrib(const Glib::RefPtr<const Gdk::GL::Config>& glconfig,
const char* attrib_str,
int attrib,
bool is_boolean);
static void examine_gl_attrib(const Glib::RefPtr<const Gdk::GL::Config>& glconfig);
};
//
// Print a configuration attribute.
//
void GLConfigUtil::print_gl_attrib(const Glib::RefPtr<const Gdk::GL::Config>& glconfig,
const char* attrib_str,
int attrib,
bool is_boolean)
{
int value;
if (glconfig->get_attrib(attrib, value))
{
std::cout << attrib_str << " = ";
if (is_boolean)
std::cout << (value == true ? "true" : "false") << std::endl;
else
std::cout << value << std::endl;
}
else
{
std::cout << "*** Cannot get "
<< attrib_str
<< " attribute value\n";
}
}
//
// Print configuration attributes.
//
void GLConfigUtil::examine_gl_attrib(const Glib::RefPtr<const Gdk::GL::Config>& glconfig)
{
std::cout << "\nOpenGL visual configurations :\n\n";
std::cout << "glconfig->is_rgba() = "
<< (glconfig->is_rgba() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->is_double_buffered() = "
<< (glconfig->is_double_buffered() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->is_stereo() = "
<< (glconfig->is_stereo() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->has_alpha() = "
<< (glconfig->has_alpha() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->has_depth_buffer() = "
<< (glconfig->has_depth_buffer() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->has_stencil_buffer() = "
<< (glconfig->has_stencil_buffer() ? "true" : "false")
<< std::endl;
std::cout << "glconfig->has_accum_buffer() = "
<< (glconfig->has_accum_buffer() ? "true" : "false")
<< std::endl;
std::cout << std::endl;
print_gl_attrib(glconfig, "Gdk::GL::USE_GL", Gdk::GL::USE_GL, true);
print_gl_attrib(glconfig, "Gdk::GL::BUFFER_SIZE", Gdk::GL::BUFFER_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::LEVEL", Gdk::GL::LEVEL, false);
print_gl_attrib(glconfig, "Gdk::GL::RGBA", Gdk::GL::RGBA, true);
print_gl_attrib(glconfig, "Gdk::GL::DOUBLEBUFFER", Gdk::GL::DOUBLEBUFFER, true);
print_gl_attrib(glconfig, "Gdk::GL::STEREO", Gdk::GL::STEREO, true);
print_gl_attrib(glconfig, "Gdk::GL::AUX_BUFFERS", Gdk::GL::AUX_BUFFERS, false);
print_gl_attrib(glconfig, "Gdk::GL::RED_SIZE", Gdk::GL::RED_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::GREEN_SIZE", Gdk::GL::GREEN_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::BLUE_SIZE", Gdk::GL::BLUE_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ALPHA_SIZE", Gdk::GL::ALPHA_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::DEPTH_SIZE", Gdk::GL::DEPTH_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::STENCIL_SIZE", Gdk::GL::STENCIL_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ACCUM_RED_SIZE", Gdk::GL::ACCUM_RED_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ACCUM_GREEN_SIZE", Gdk::GL::ACCUM_GREEN_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ACCUM_BLUE_SIZE", Gdk::GL::ACCUM_BLUE_SIZE, false);
print_gl_attrib(glconfig, "Gdk::GL::ACCUM_ALPHA_SIZE", Gdk::GL::ACCUM_ALPHA_SIZE, false);
std::cout << std::endl;
}
//
// Gears scene.
//
class GearsScene : public Gtk::GL::DrawingArea
{
public:
explicit GearsScene(bool is_sync = true);
virtual ~GearsScene();
protected:
void gear(GLfloat inner_radius,
GLfloat outer_radius,
GLfloat width,
GLint teeth,
GLfloat tooth_depth);
protected:
// signal handlers:
virtual void on_realize();
virtual bool on_configure_event(GdkEventConfigure* event);
virtual bool on_expose_event(GdkEventExpose* event);
virtual bool on_map_event(GdkEventAny* event);
virtual bool on_unmap_event(GdkEventAny* event);
virtual bool on_visibility_notify_event(GdkEventVisibility* event);
virtual bool on_idle();
public:
// Invalidate whole window.
void invalidate() {
get_window()->invalidate_rect(get_allocation(), false);
}
// Update window synchronously (fast).
void update()
{ get_window()->process_updates(false); }
protected:
// idle signal connection:
sigc::connection m_ConnectionIdle;
public:
// get & set view rotation values.
void get_view_rot(GLfloat& x, GLfloat& y, GLfloat& z)
{ x = m_ViewRotX; y = m_ViewRotY; z = m_ViewRotZ; }
void set_view_rot(GLfloat x, GLfloat y, GLfloat z)
{ m_ViewRotX = x; m_ViewRotY = y; m_ViewRotZ = z; }
protected:
// OpenGL scene related variables:
GLint m_Gear1;
GLint m_Gear2;
GLint m_Gear3;
GLfloat m_ViewRotX;
GLfloat m_ViewRotY;
GLfloat m_ViewRotZ;
GLfloat m_Angle;
bool m_IsSync;
protected:
// frame rate evaluation stuff:
Glib::Timer m_Timer;
int m_Frames;
};
GearsScene::GearsScene(bool is_sync)
: m_Gear1(0), m_Gear2(0), m_Gear3(0),
m_ViewRotX(20.0), m_ViewRotY(30.0), m_ViewRotZ(0.0),
m_Angle(0.0), m_IsSync(is_sync),
m_Frames(0)
{
//
// Configure OpenGL-capable visual.
//
Glib::RefPtr<Gdk::GL::Config> glconfig;
// Try double-buffered visual
glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB |
Gdk::GL::MODE_DEPTH |
Gdk::GL::MODE_DOUBLE);
if (!glconfig)
{
std::cerr << "*** Cannot find the double-buffered visual.\n"
<< "*** Trying single-buffered visual.\n";
// Try single-buffered visual
glconfig = Gdk::GL::Config::create(Gdk::GL::MODE_RGB |
Gdk::GL::MODE_DEPTH);
if (!glconfig)
{
std::cerr << "*** Cannot find any OpenGL-capable visual.\n";
std::exit(1);
}
}
// print frame buffer attributes.
GLConfigUtil::examine_gl_attrib(glconfig);
//
// Set OpenGL-capability to the widget.
//
set_gl_capability(glconfig);
// Add events.
add_events(Gdk::VISIBILITY_NOTIFY_MASK);
}
GearsScene::~GearsScene()
{
}
/*
* Draw a gear wheel. You'll probably want to call this function when
* building a display list since we do a lot of trig here.
*
* Input: inner_radius - radius of hole at center
* outer_radius - radius at center of teeth
* width - width of gear
* teeth - number of teeth
* tooth_depth - depth of tooth
*/
void GearsScene::gear(GLfloat inner_radius,
GLfloat outer_radius,
GLfloat width,
GLint teeth,
GLfloat tooth_depth)
{
GLint i;
GLfloat r0, r1, r2;
GLfloat angle, da;
GLfloat u, v, len;
r0 = inner_radius;
r1 = outer_radius - tooth_depth / 2.0;
r2 = outer_radius + tooth_depth / 2.0;
da = 2.0 * G_PI / teeth / 4.0;
glShadeModel(GL_FLAT);
glNormal3f(0.0, 0.0, 1.0);
/* draw front face */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
if (i < teeth) {
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
}
}
glEnd();
/* draw front sides of teeth */
glBegin(GL_QUADS);
da = 2.0 * G_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
}
glEnd();
glNormal3f(0.0, 0.0, -1.0);
/* draw back face */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
if (i < teeth) {
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
}
}
glEnd();
/* draw back sides of teeth */
glBegin(GL_QUADS);
da = 2.0 * G_PI / teeth / 4.0;
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
}
glEnd();
/* draw outward faces of teeth */
glBegin(GL_QUAD_STRIP);
for (i = 0; i < teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glVertex3f(r1 * cos(angle), r1 * sin(angle), width * 0.5);
glVertex3f(r1 * cos(angle), r1 * sin(angle), -width * 0.5);
u = r2 * cos(angle + da) - r1 * cos(angle);
v = r2 * sin(angle + da) - r1 * sin(angle);
len = sqrt(u * u + v * v);
u /= len;
v /= len;
glNormal3f(v, -u, 0.0);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), width * 0.5);
glVertex3f(r2 * cos(angle + da), r2 * sin(angle + da), -width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), width * 0.5);
glVertex3f(r2 * cos(angle + 2 * da), r2 * sin(angle + 2 * da), -width * 0.5);
u = r1 * cos(angle + 3 * da) - r2 * cos(angle + 2 * da);
v = r1 * sin(angle + 3 * da) - r2 * sin(angle + 2 * da);
glNormal3f(v, -u, 0.0);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), width * 0.5);
glVertex3f(r1 * cos(angle + 3 * da), r1 * sin(angle + 3 * da), -width * 0.5);
glNormal3f(cos(angle), sin(angle), 0.0);
}
glVertex3f(r1 * cos(0), r1 * sin(0), width * 0.5);
glVertex3f(r1 * cos(0), r1 * sin(0), -width * 0.5);
glEnd();
glShadeModel(GL_SMOOTH);
/* draw inside radius cylinder */
glBegin(GL_QUAD_STRIP);
for (i = 0; i <= teeth; i++) {
angle = i * 2.0 * G_PI / teeth;
glNormal3f(-cos(angle), -sin(angle), 0.0);
glVertex3f(r0 * cos(angle), r0 * sin(angle), -width * 0.5);
glVertex3f(r0 * cos(angle), r0 * sin(angle), width * 0.5);
}
glEnd();
}
void GearsScene::on_realize()
{
// We need to call the base on_realize()
Gtk::DrawingArea::on_realize();
//
// Get GL::Drawable.
//
Glib::RefPtr<Gdk::GL::Drawable> gldrawable = get_gl_drawable();
//
// GL calls.
//
// *** OpenGL BEGIN ***
if (!gldrawable->gl_begin(get_gl_context()))
return;
static GLfloat pos[4] = {5.0, 5.0, 10.0, 0.0};
static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
static GLfloat blue[4] = {0.2, 0.2, 1.0, 1.0};
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glEnable(GL_CULL_FACE);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
glEnable(GL_DEPTH_TEST);
// Make the gears.
m_Gear1 = glGenLists(1);
glNewList(m_Gear1, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
gear(1.0, 4.0, 1.0, 20, 0.7);
glEndList();
m_Gear2 = glGenLists(1);
glNewList(m_Gear2, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
gear(0.5, 2.0, 2.0, 10, 0.7);
glEndList();
m_Gear3 = glGenLists(1);
glNewList(m_Gear3, GL_COMPILE);
glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
gear(1.3, 2.0, 0.5, 10, 0.7);
glEndList();
glEnable(GL_NORMALIZE);
std::cout << "GL_RENDERER = " << glGetString(GL_RENDERER) << std::endl;
std::cout << "GL_VERSION = " << glGetString(GL_VERSION) << std::endl;
std::cout << "GL_VENDOR = " << glGetString(GL_VENDOR) << std::endl;
std::cout << "GL_EXTENSIONS = " << glGetString(GL_EXTENSIONS) << std::endl;
std::cout << std::endl;
gldrawable->gl_end();
// *** OpenGL END ***
// Start timer.
m_Timer.start();
}
bool GearsScene::on_configure_event(GdkEventConfigure* event)
{
//
// Get GL::Drawable.
//
Glib::RefPtr<Gdk::GL::Drawable> gldrawable = get_gl_drawable();
//
// GL calls.
//
// *** OpenGL BEGIN ***
if (!gldrawable->gl_begin(get_gl_context()))
return false;
GLfloat h = (GLfloat)(get_height()) / (GLfloat)(get_width());
glViewport(0, 0, get_width(), get_height());
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0, -40.0);
gldrawable->gl_end();
// *** OpenGL END ***
return true;
}
bool GearsScene::on_expose_event(GdkEventExpose* event)
{
//
// Get GL::Drawable.
//
Glib::RefPtr<Gdk::GL::Drawable> gldrawable = get_gl_drawable();
//
// GL calls.
//
// *** OpenGL BEGIN ***
if (!gldrawable->gl_begin(get_gl_context()))
return false;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(m_ViewRotX, 1.0, 0.0, 0.0);
glRotatef(m_ViewRotY, 0.0, 1.0, 0.0);
glRotatef(m_ViewRotZ, 0.0, 0.0, 1.0);
glPushMatrix();
glTranslatef(-3.0, -2.0, 0.0);
glRotatef(m_Angle, 0.0, 0.0, 1.0);
glCallList(m_Gear1);
glPopMatrix();
glPushMatrix();
glTranslatef(3.1, -2.0, 0.0);
glRotatef(-2.0 * m_Angle - 9.0, 0.0, 0.0, 1.0);
glCallList(m_Gear2);
glPopMatrix();
glPushMatrix();
glTranslatef(-3.1, 4.2, 0.0);
glRotatef(-2.0 * m_Angle - 25.0, 0.0, 0.0, 1.0);
glCallList(m_Gear3);
glPopMatrix();
glPopMatrix();
// Swap buffers.
if (gldrawable->is_double_buffered())
gldrawable->swap_buffers();
else
glFlush();
gldrawable->gl_end();
// *** OpenGL END ***
//
// Print frame rate.
//
++m_Frames;
double seconds = m_Timer.elapsed();
if (seconds >= 5.0)
{
// std::cout.setf(std::ios_base::fixed, std::ios_base::floatfield);
std::cout.setf(std::ios::fixed, std::ios::floatfield);
std::cout.precision(3);
std::cout << m_Frames << " frames in "
<< seconds << " seconds = "
<< (m_Frames / seconds) << " FPS\n";
m_Timer.reset();
m_Frames = 0;
}
return true;
}
bool GearsScene::on_map_event(GdkEventAny* event)
{
if (!m_ConnectionIdle.connected())
m_ConnectionIdle = Glib::signal_idle().connect(
sigc::mem_fun(*this, &GearsScene::on_idle), GDK_PRIORITY_REDRAW);
return true;
}
bool GearsScene::on_unmap_event(GdkEventAny* event)
{
if (m_ConnectionIdle.connected())
m_ConnectionIdle.disconnect();
return true;
}
bool GearsScene::on_visibility_notify_event(GdkEventVisibility* event)
{
if (event->state == GDK_VISIBILITY_FULLY_OBSCURED)
{
if (m_ConnectionIdle.connected())
m_ConnectionIdle.disconnect();
}
else
{
if (!m_ConnectionIdle.connected())
m_ConnectionIdle = Glib::signal_idle().connect(
sigc::mem_fun(*this, &GearsScene::on_idle), GDK_PRIORITY_REDRAW);
}
return true;
}
bool GearsScene::on_idle()
{
m_Angle += 2.0;
// Invalidate the whole window.
invalidate();
// Update window synchronously (fast).
if (m_IsSync)
update();
return true;
}
//
// The application class.
//
class Gears : public Gtk::Window
{
public:
explicit Gears(bool is_sync = true);
virtual ~Gears();
protected:
// signal handlers:
void on_button_quit_clicked();
virtual bool on_key_press_event(GdkEventKey* event);
protected:
// member widgets:
Gtk::VBox m_VBox;
GearsScene m_GearsScene;
Gtk::Button m_ButtonQuit;
};
Gears::Gears(bool is_sync)
: m_VBox(false, 0), m_GearsScene(is_sync), m_ButtonQuit("Quit")
{
//
// Top-level window.
//
set_title("Gears");
// Get automatically redrawn if any of their children changed allocation.
set_reallocate_redraws(true);
add(m_VBox);
//
// Gears scene.
//
m_GearsScene.set_size_request(300, 300);
m_VBox.pack_start(m_GearsScene);
//
// Simple quit button.
//
m_ButtonQuit.signal_clicked().connect(
sigc::mem_fun(*this, &Gears::on_button_quit_clicked));
m_VBox.pack_start(m_ButtonQuit, Gtk::PACK_SHRINK, 0);
//
// Show window.
//
show_all();
}
Gears::~Gears()
{
}
void Gears::on_button_quit_clicked()
{
Gtk::Main::quit();
}
bool Gears::on_key_press_event(GdkEventKey* event)
{
GLfloat x, y, z;
m_GearsScene.get_view_rot(x, y, z);
switch (event->keyval)
{
case GDK_z:
z += 5.0;
break;
case GDK_Z:
z -= 5.0;
break;
case GDK_Up:
x += 5.0;
break;
case GDK_Down:
x -= 5.0;
break;
case GDK_Left:
y += 5.0;
break;
case GDK_Right:
y -= 5.0;
break;
case GDK_Escape:
Gtk::Main::quit();
break;
default:
return true;
}
m_GearsScene.set_view_rot(x, y, z);
m_GearsScene.invalidate();
return true;
}
//
// Main.
//
int main(int argc, char** argv)
{
Gtk::Main kit(argc, argv);
//
// Init gtkglextmm.
//
Gtk::GL::init(argc, argv);
//
// Parse arguments.
//
bool is_sync = true;
for (int i = 1; i < argc; ++i) {
if (std::strcmp(argv[i], "--async") == 0)
is_sync = false;
}
//
// Instantiate and run the application.
//
Gears gears(is_sync);
kit.run(gears);
return 0;
}
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